Pinus uncinata forests of the inner Alps, of the western outer Alps and the Jura, and of Pyrenean sunny slopes (adrets), accompanied by a shrubby undergrowth in which Rhododendron ferrugineum is absent or rare, while Juniperus nana, Juniperus hemisphaerica, Arctostaphylos uva-ursi, Arctostaphylos alpinus, Erica herbacea, Rhododendron hirsutum, Cotoneaster integerrimus, Daphne striata, Dryas octopetala or Polygala chamaebuxus may be prominent.
Spontaneous subsummital Pinus uncinata woods of the Ventoux, with Juniperus nana, Juniperus hemisphaerica and Arctostaphylos uva-ursi.